Yes you will need the little plastic adapter for the slip ring as its a totally different shape than the B6 one.
Regarding leaving the wiring alone on the airbag cabling, this will just connect the high impact airbag which is what most people do as nobody is sure it works if you put both through stages through the one igniter
where are you ??, it is not that hard, aslong as you have the instructions, tools and vagcom you will be fine
The paddles do come off but you will have a gap where they were, just leave them on